/Engine/Source/Runtime/MovieScene/Public/Evaluation/MovieSceneEvaluationField.h
Persistent entities remain alive for the entire duration of their applicable ranges.
void AddPersistentEntity ( const [TRange](API\Runtime\Core\Math\TRange)< [FFrameNumber](API\Runtime\Core\Misc\FFrameNumber) > & Range, [UObject](API\Runtime\CoreUObject\UObject\UObject) * EntityOwner, uint32 EntityID, int32 InMetaDataIndex )